I tried following the tutorial and it did not work. I'm using the latest extensions and CS6 so I don't know if that may have any affect? I also noticed that the code line numbers in the tutorial do not match the code line numbers in the my files.
This is my modified link:
<?php $address_link = $row_events['address']; ?>
<a href="#event_more_info" class="moreInfo" onClick="wagmp_map_1_obj.getPointByAddress ('<?php echo $address_link;?>').marker.openInfoWindowHtml (wagmp_map_1_obj.getPointByAddress('<?php echo $address_link;?>').address.infowindowtext);"><strong>+more information</strong></a>
Here is a link to the page: